Will remove grpc impedance mismatch.

Changing size type in Transport Security (TSI) from uint32_t to size_t

Fix run_test.py so it runs the first time

- add rubocop as a dev dependency
- fixed many style violations it reported, often using --auto-correct
- add a rubocop config
 - .rubocop.yml shows the exceptions
 - .rubocopy_todo.yml tracks outstanding style issues
- adds a rake task to allow rubocop styling checks to be automated

Compile fix

Node generated code

The client should return status deadline exceeded when the deadline is
exceeded (not cancelled status)

Fix returned status

Allows servers to expedite shutdown once all in-progress calls are
completed. We may want to eventually remove grpc_server_shutdown in
preference to this.

…style_issues

Grpc ruby add rubocop fix lint style issues

…of its more obscure features.

…_again

Fixes a regression in the style pull request

Adding a few more comments in the Makefile template

Add an optional server shutdown event.

Allow running PHP unit tests from run_tests.py

clang compile fixes